V2 head on Lifan 150cc - Page 5

Psomniferum · 04-01-2020, 09:45 PM

I think I'm on to something here... I was able to hack off the last 1/2" of the kill-switch housing as it was just the cavity for the throttle-tube to spin in. I'm tempted to cut a 2nd box much more cleanly once I test this out and make sure it works as I want it to. I've already cleaned all the blue spray off with some thinner.

The Honda unit feels SO much better than the stock one!

Psomniferum · 04-02-2020, 03:19 AM

Attempt #2 - I took a dremel and carved the kill-switch box around the new throttle-tube. I'm happy with the results!

Psomniferum · 04-02-2020, 02:13 PM

The 1st image is my vm22 atop the intake that came with the 150cc. Perfect fit! The 2nd image is my vm26 with the v2 intake from TBolt Parts. I'm a day or 2x away from swapping engines. For now, I was going to put the 150 in stock and was thinking of topping it with the vm22. I was hoping to pair the vm26 with the V2 head when I installed it. Will the vm22 be too anemic for the 150? I did buy jet kits for BOTH carbs. But I need to buy another intake to fit the vm26 to the stock head. I was hoping to skip that hassle...
The 125 was equipped with a PZ22 which I've read measures a true 19mm and I've heard the vm22 measures LARGER than 22mm? The owner's manual informs me the 125 makes 5.4w (7.2 hp) while the 150 produces 9 (12 hp) so right off the bat I'm gaining 67% power! My goal for the head (ported and polished, cr between 9.5:1 and 10:1) is 15+ hp. I've read it takes 18 hp to go 85 mph on this model.

Psomniferum · 04-02-2020, 02:23 PM

These are the manuals I've bought so far. The Chinese 125cc manual is ALL upright engines, grrrr! I ordered the pit bike manual and patiently await its arrival! According to Google Preview, it has a chapter on horizontal engines. Can anyone RECOMMEND a manual for these Grom knock-offs? The torque specs do NOT match the Grom's.

Psomniferum · 04-11-2020, 09:10 PM

My mom fell very ill and almost died. We believe she is past the worst of the illness, but she is still in the hospital. I'm sure you guys understand why the bike was on the back burner for a while.

I finally got the repair manual for pit bikes and I believe we have a winner this time! It includes the teardown of 3x different "laydown cylinder" (I learned THAT reading the intro. to the manual) horizontal engines. Not EXACTLY my 150cc, but I'm sure I can figure things out between the 3x.

Psomniferum · 04-11-2020, 09:19 PM

The piece on the bottom is a Honda "upgrade" linkage. The eye-holes are m6 and the shaft itself is 190mm. You could order the shaft in MANY lengths. I'm going to order a 200mm so I don't have to turn the ends oout as far, but this will work for now. The piece on the top is 2x Heimz fittings, sized m8, with a 1.25mm threaded rod.

I do believe the Honda unit will fit without any modifications, I would have to drill the holes on the Grom linkage from 7mm up to m8 to use the Heimz set-up.

I'll go to the hardware store to get the necessary nuts and will install tomorrow. Looks like I won't be using the Heimz piece, I bought it as a back up.

Psomniferum · 04-11-2020, 09:55 PM

I bought the "skinny" unit from EBay for apx. $13, I think it was $8 + $5 shipping. It has all the features of the stock unit EXCEPT the provision for holding the throttle-tube. Therefore, you may remove the stock unit and throttle and replace with aftermarket throttle-tube without carving up the kill-switch box like I did.

Psomniferum · 04-13-2020, 10:43 AM

Because of my ignorance when it comes to bikes, I failed to specify that I had a DOUBLE front-brake caliper. My bike requires 3x lines, NOT 2x. I have a cross-over from one side of the caliper to the other. Luckily for me, Dave down at CORE is being way cool about it and he's sending me the 3rd line! Thanx Dave.

I am now aware that the front brakes on a Venom x22 are more similar to a CBR250RR (double front-caliper) than they are a CBR250R (single caliper). I guess there are OTHER major differences between the R and the RR, like big differences in the frame and swing-arm. I'm going to have to hit the books to see what my bike more closely follows so I don't run into anymore compatibility issues.

franque · 04-13-2020, 12:36 PM

I'm not sure I follow, are you saying it's a double disc front end? If so, you can get a longer banjo bolt that will allow you to run two lines from the m/c. The CBR250RR was never sold in the States, telling the person to look for that might just confused them. You'll just need an extra crush washer. I'm glad to see it coming back together.

04-13-2020, 12:36 PM	#69
franque Join Date: Nov 2017 Location: Marseille, France -> Conakry, Guinea Posts: 1,481	I'm not sure I follow, are you saying it's a double disc front end? If so, you can get a longer banjo bolt that will allow you to run two lines from the m/c. The CBR250RR was never sold in the States, telling the person to look for that might just confused them. You'll just need an extra crush washer. I'm glad to see it coming back together.
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